The Trump administration will repeal the Clean Power Plan, the centerpiece of President Barack Obama’s effort to fight climate change, and will ask the public to recommend ways it could be replaced, according to an internal Environmental Protection Agency document.

The draft proposal represents the administration’s first substantive step toward rolling back the plan, which was designed to curb greenhouse gas emissions from the power sector.

The EPA document, “October 2017 Tiering List,” lays out coming policy issues of high priority for the agency’s office of air and radiation, which oversees air pollution policies.

“The agency is issuing a proposal to repeal the rule,” the document states. It says the agency will issue a formal notice of its intention to develop a new rule “similarly intended to reduce carbon dioxide emissions from existing fossil-fueled electric utility generating units and to solicit information for the agency to consider in developing such a rule.”

The document does not explain how the EPA will justify to the courts the decision to eliminate the regulation.